Help needed, I am trying to split a piece into "snap in place" parts for 3d printing

[JuanDAyalde]

Hello everyone. I designed a water tower (picture attached) for 3d printing but I am having trouble with the legs. The idea is to split the legs in 3 types of parts. 
1. The circle (1 pc)
2. 4 main legs (4 pcs)
3. The "X" shaped bars between the legs. (4 pcs)

I want it to make as clean as possible, in order to minimize material use and waste. My idea is to separate the tower into those 3 main parts that will be easily printable and will not require supports. Also, I want to make it such that the parts can be assembled with a "snap in place" or "click in place" mechanism. I do not know what the best way to do this in fusion is though and that is where I need help. I attach pictures of what I am trying to do and I appreciate any help and suggestions. I also attach the fusion file (I anyone wants to print the water tower themselves, be my guest).

[g-andresen]

Hi,

no need for split > without support and no warnings in Prusa Slicer

günther

[JuanDAyalde]

Hi @g-andresen 

Thanks for the reply. Unfortunately prusa slicer is not a good reference. What happens is that the legs and X bars start moving (wobble) too much the higher the print goes. This makes the filament deposition inconsistent and eventually leads to failure.

I tried printing on an MK4 and sliced with prusa slicer, but I appreciate if we leave printing settings/slicer etc.  for another thread, trust me, I have tried most of it (even printing at 20 mm/s).

I appreciate if you have any suggestions for the approach you might use over in fusion for splitting the part into pieces in a modular "snap in place" fashion.

Cheers, 

Juan

[g-andresen]

Hi,

Just this much:
I have printed several objects of a similar shape (conical vessels 45/60 deg with open hexagon patterns) up to heights of 160 mm without such effects.

günther

[JuanDAyalde]

hi @g-andresen Thanks for the reply.

If I may request to you, can you try printing the part for the water tower? Maybe you can pull it off and I might ask you for your help on printer/slicer settings if so.

Cheers, 

Juan

[g-andresen]

Hi,

I tested it and found that the thin, cantilevered legs move more and more with each change of position.
With each new layer, they are pulled back and forth due to their thin profile
With my hexagon patterns, the stiffness of the system was greater due to the adjacent elements.
Here is a method that should work.
I made a small change to get better support on the print bed. I have provided a 1.8mm groove (tube) for a filament strand to facilitate assembly. The dimension may need to be adjusted.

günther